|
|
New
Technical Quarterly Paper Published |
|
"Monitoring Barley Extract Utilization by
Saccharomyces cerevisiae in a Microbrewery,” by Clarence S. Yah and Sunny E. Iyuke, has been published in the MBAA
Technical Quarterly.
Abstract
Among the cereals used for alcohol production, barley is usually preferred due to its high carbohydrate content. Standard brewing barley wort extracts contain approx. 80–90% carbohydrates, of which maltose makes up approx. 60–70% of the total. It is, therefore, of paramount importance to understand the utilization of barley wort carbohydrate extracts by
Saccharomyces cerevisiae during the fermentation process. The conversion of barley wort to beer, which is used as an index of beer strength, is a function of
Saccharomyces yeast. The fermented wort has an impact on beer stability due to the presence of sugars, as well as on beer quality and shelf life. Partition high-performance liquid chromatography (HPLC) was used to determine the individual fermentable sugars in the wort of lager beer produced at the Wits microbrewery laboratory. The sugars (glucose, fructose, and maltose) monitored were identified by their retention times, which varied from 2.82 ± 0.01 to 8.62 ± 0.18 min at a 95% confidence interval. Fermented wort extract pH decreased with a concomitant increase in the yeast biomass and alcohol content of the fermenting sugars. There was a decrease in the refractive indices of the fermenting medium with the exhaustion of the sugars, resulting in a constant specific gravity of 1.015, which indicated total consumption of the sugars. The highly sensitive HPLC method of monitoring different sugar levels served as a key indicator as to when the fermentation process was complete. This process is important because it can help ensure that the wort carbohydrate chemistry and parameters (temperature and pH) are optimized to produce the maximum yield of ethanol.
Back to Top |
|
District Ontario to Hold 58th Annual Barley Field Day |
|
Attached is the program for the
58th Annual Barley Field Day, which is being held this year in conjunction with the 21st BMBRI Triennial Barley Improvement Meeting. The dates are June 23 and 24. Our gracious hosts for the Barley Field Day on Thursday, June 24, Canada Malting, would like all those planning to attend to confirm their attendance to Matt Letki via e-mail to
mailto:matthew.letki@canadamalting.com even if you have already replied to Michael Brophy. For more information, visit the MBAA
District Ontario website.
Allan Ellingham
District Secretary
Back to Top |
|
District St. Louis Announces Scholarship Award |
|
MBAA
District St. Louis is pleased to announce the award of a $750 scholarship to member James Hellmuth, who will apply the funds toward his attendance of the World Brewing Academy International diploma course. This 12-week program is offered by the Siebel Institute in Chicago, with 7 weeks of intensive theory and 5 weeks of practical application at Doeman's in Munich, Germany. James wrote an essay as a part of the scholarship application process detailing how his efforts in obtaining this diploma will improve his role in the brewing industry. Upon completion, he will provide District members with a presentation on his experience at a District monthly meeting in the near future.
Congratulations to James Hellmuth from District St. Louis!
Steve Huffman
District Publicity Chair
Back to Top |
|
District Western Canada Planning Joint Meeting with Western Barley Growers Association in 2011 |
|
MBAA
District Western Canada is in the initial phases of planning a joint meeting with the Western Barley Growers Association to be held in Calgary, AB, in February 2011. The District Executive Committee is looking for members of the District to aid in the planning and execution of this meeting. Please contact Robert McCaig at
mailto:rmccaig@cmbc.com or Doug Wilkie at
mailto:doug.wilkie@malteurop.com if you can help. More news to follow!
Rob McCaig
District President and BOG Representative
Back to Top |
| Send Us Your News |
| If you have suggestions for items you would like included in
The MBAA Communicator, please send items to
MBAA Headquarters.
Copyright 2010 the Master Brewers Association of the Americas
E-mail privacy Policy: MBAA respects member privacy and does not
share, trade, or sell member e-mail addresses for use by other parties.
We
invite your Feedback on The
MBAA Communicator.
Please send changes of address and all membership inquiries to
Cheryl Kruchten . |
|
|
